Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0ca4b3c709b1ad…

MALICIOUS

PDF

45.6 KB Created: 2021-06-09 11:31:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 281d8efc368ef10f802d2e3bd470043e SHA-1: f6f532c71c59b03e3d146713181cf2f0d039fef4 SHA-256: dc0ca4b3c709b1adccffb5a7ca8216f782a0a98fe0d253cb2d20ee57a7ad523f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.tw/app/431946152/roblox-weight-simulator-3-cheat-code-game-hack PDF link annotation
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-roblox-iteams_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-roblox-intros_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-hacks-gratis_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005049.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5049 25548 bytes
SHA-256: dabbfa91a3b4518bd4c71e700673f00df1538e92a158c8871b7769089ab2b01b
font_01_sfnt_off00008b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B73 19636 bytes
SHA-256: de4d9a133d8171f187aeff80cf71e8e6ee71c351bd760a4bad3574bdfd8153e2

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